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Verbesserung des Datenmanagements in inhomogenen rechnernetzen geodätischer Messeinrichtungen auf des Basis von Middleware und Dateisystemen am Beispiel der Fundamentalstation Wettzell / A. Neidhardt (2005)

Public Titre : Verbesserung des Datenmanagements in inhomogenen rechnernetzen geodätischer Messeinrichtungen auf des Basis von Middleware und Dateisystemen am Beispiel der Fundamentalstation Wettzell Titre original : [Amélioration de la gestion des données dans l'organisation des mesures géodésiques des réseaux informatiques non homogènes sur la base de logiciels intermédiaires et de systèmes de datums, par exemple à la station fondamentale de Wettzell] Type de document : Monographie Auteurs : A. Neidhardt, Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2005 Collection : Mitteilungen des Bundesamtes für Kartographie und Geodäsie, ISSN 1436-3445 num. 37 Importance : 378 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-915-5 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] CORBA [Termes IGN] échange de données informatisé [Termes IGN] jeu de données localisées [Termes IGN] station GPS [Termes IGN] station permanente [Termes IGN] traitement de données GNSS [Termes IGN] Wettzell [Termes IGN] XML Index. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) Geodetic observatories for space techniques are the fundament for global reference systems since the beginning of space geodesy. The producing of data by these area-wide distributed, permanent data acquisition sites is therefore a main part. However, the requirements increase. A higher amount of measured data have to be transported to the analysing centres without long lasting down times during a more and more reduced time period. Interferences in these data workflows would cause affects in the continuity of the generated time series. Because of the fact that the main interest for the geodesists applies to the measured geodetic data the aspect of administration and availability for that geodetic data is being more or less underrated. Properly working information processing facilities are supposed to be simply existent. But meanwhile the historically crown systems reach their self set limits. This fact was the cause for a project study defined at the research and development program 2001 to 2005 by the German Research Group for Satellite Geodesy (Forschungsgruppe Satellitengeodasie (FGS)) with the challenge to analyze the data management basically. This defines the frame of the present work, which is an interdisciplinary approach affecting geodesy as well as computer science. Found ideas are applied to the current situation at the geodetic observatory at Wettzell as an exemplary realization. A profound analysis showed, that the problems are more basical than they were written at the studies notification. The used transfer mechanisms and flows cause a remarkable amount of unstableness. The incrementally accomplished generalisation of the collected information leaded to a three step method, which addresses the abstraction of problem categories and their technical realization. A basic element is therefore the creation of a reliable, flexible, transparent and stable transfer mechanism. The developed Extended CORBA File Transfer (ECFT) offers most of the criteria for quality of service, which are not or only partially existent in current solutions. And when they are offered they are restricted by system borders. Concurrency control, state driven processing, error or fault management and a flexible system architecture with hidden technical attributes are only a few elements of the new system. With it geodetic data can be transported as well in local area networks as over world wide existing nets. At least the next step deals with the data handling itself. The originally wished creation of a consistent meta data set was not really considered as reasonable. External procurements and historically given parts would hardly be integrated with this regulation. The present work keeps the individuality of data and their formats instead and offers a homogeneous transformation possibility by defining a description language based on the Extensible Markup Language (XML). This method for conversions of semi-structured and structured data formats can be seen as unique at the moment, because all other techniques uses the abilities of foreign programming languages to convert the original data into a markup set. With the created constructs in the present work any geodetic data sets can be transformed into any wished format. The final step of the three phases of abstraction creates a superordinated configuration for the currently existing conditions at the geodetic observatory Wettzell. The classification into manageable administration zones with dedicated competencies and their structured interaction over flexible interface access points with a hierarchically structured data processing workflow combines all of the so far developed ideas to a harmonical unit. The specific character of the present work is therefore especially given by the strong reference to technical realizations. Main focus always laid on a real implementation of the theories and strategies. So the strict compliance of a software process was selected for the structure of the present work. Because of that the developed parts will also be enhanced partially for specific application sets after the ending of this work, e.g. for the new Satellite Observing System Wettzell (SOS-W). Numéro de notice : 13315 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54963

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13315-01	30.61	Livre	Centre de documentation	Géodésie	Disponible
13315-02	30.61	Livre	Centre de documentation	Géodésie	Disponible